While becoming stronger for sets of 5-8 reps on the basic pressing movements is the key to great delts, there's no doubt that properly executed lateral raises can help you get there faster.
How? Both by directly developing the delts and by improving your capacity to recruit them so they're better stimulated when you do heavy pressing work.
When used to develop a solid mind-muscle connection, lateral raises can be done pretty much every day. Here's why:
First, they cause very little muscle damage. Muscle damage is created when you're stretching the muscle fibers under load and tension. That occurs during the eccentric phase of the movement.
In lateral raises, only the top quarter of the range of motion is under significant loading. Let's say that in the finish position your arms form a 90-degree angle with your torso. Your delts are only under significant loading when the arms reach about 70-75 degrees. Before that you aren't moving opposite the source of resistance (which is directly down). You're moving more sideways than up.
It's the same thing when you're going down – the deltoid (especially the medial head) will be under load only for the first quarter of the eccentric range of motion, which is when the muscle is shortened. When the muscle is stretched, there's literally zero tension on the delts.
On top of that, if you do the lateral raise properly (no swinging at the bottom where there's no resistance and you can easily speed up), you won't be using a lot of weight, which also decreases the amount of muscle damage.
Since the movement isn't neurologically demanding, it likely won't hurt neurological recovery either.
You can easily do 3-4 sets of 12 in this fashion every day to improve mind-muscle connection and stimulate growth.
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